Patents by Inventor Junya Nakajima

Junya Nakajima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4851326
    Abstract: A silver halide color photographic material having at least one silver halide emulsion layer on a reflective support is, after having been imagewise exposed, subjected to color development with a color developer which does not substantially contain benzyl alcohol and which contains a bromide ion in an amount of 4.times.10.sup.-3 mol/liter or less, for a period of time of 2 minutes or less, to obtain a color images with a high colored density. The silver halide color photographic material specifically has at least one silver chlorobromide emulsion layer which does not substantially contain silver iodide and which contains silver chloride in an amount of 50 mol % or more.In the color images thus formed by the present process, the colored density is high and the fog is less.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: July 25, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Junya Nakajima
  • Patent number: 4818673
    Abstract: A method for processing a silver halide color photographic material is disclosed, which comprises processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one silver halide emulsion layer comprising silver chloride or silver chlorobromide containing at least 80 mol % of silver chloride with a color developing solution and thereafter processing the material with a bleach-fixing solution, wherein the bleach-fixing solution contains a ferric complex salt of an organic acid and from about 1.times.10.sup.-2 to about 2 mol of bromide ions and/or from about 5.times.10.sup.-4 to about 5.times.10.sup.-2 mol of iodide ions per liter.The method for processing a silver halide color photographic material according to the present invention is excellent in desilvering ability, and enables rapid processing to be conducted.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: April 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Kazunori Hasebe, Junya Nakajima
  • Patent number: 4804616
    Abstract: The present invention relates to a method for continuously processing a color reversal photographic material. After black and white development, the color reversal photographic material is rinsed in a bath wherein the replenishing amount per unit area of the photographic material is 3 to 50 times as much as the amount of processing solution carried over from the preceding bath in terms of volume ratio and the pH is 9.5 or below.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: February 14, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Junya Nakajima
  • Patent number: 4798784
    Abstract: A method for processing a silver halide color photographic material which comprises, after color development of an exposed silver halide color photographic material containing a hydrolyzable type DIR coupler, rapidly processing the developed silver halide color photographic material with a liquid having a bleaching ability and subsequently with a liquid having a bleach-fixing ability, to thereby form a color image.In accordance with the method for processing a silver halide color photographic material, desilveration is completed in a short period of time and color photographic images having excellent color reproducibility and fastness are obtained.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: January 17, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinzo Kishimoto, Toshihiro Nishikawa, Akira Abe, Junya Nakajima
  • Patent number: 4769312
    Abstract: A method of processing silver halide color photographic materials which comprises image-wise exposing said silver halide color photographic materials, color developing and then desilvering them in a bath having bleaching ability, characterized in that the bath having bleaching ability comprises two baths, the oxidation-reduction potential of the first bath being higher than that of the second bath, the oxidation-reduction potential of the second bath falling in the range of +60 mV to -60 mV, the first bath containing a water-soluble bromide in an amount of 0.5 to 1.3 mole/l, and the second bath containing a water-soluble bromide in an amount of 0 to 0.5 mole/l.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: September 6, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinzo Kishimoto, Akira Abe, Junya Nakajima
  • Patent number: 4769313
    Abstract: A method of forming an image comprising, after color developmenmt of an exposed silver halide color photographic material, processing the developed silver halide color photographic material with a bath having a bleaching ability and subsequently with a bath having a bleach-fixing ability, wherein the silver halide color photographic material comprises a support having coated thereon at least one silver halide emulsion layer and at least one pyrazoloazole type magenta coupler represented by the following general formula (A): ##STR1## wherein R.sub.22 represents a hydrogen atom of a substituent; X represents a group capable of being split off upon a coupling reaction with an oxidation product of an aromatic primary amine developing agent; Za, Zb and Zc each represents a methine group, a substituted methine group, .dbd.
    Type: Grant
    Filed: November 21, 1986
    Date of Patent: September 6, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Fujimoto, Shinzo Kishimoto, Akira Abe, Junya Nakajima
  • Patent number: 4762774
    Abstract: A method for color image formation is disclosed, comprising imagewise exposing to light a silver halide color photographic material having a silver halide emulsion layer containing monodispersed silver halide grains, subjecting the exposed material to color development, and processing the material with a bath primarily having bleaching capacity and then with a bath having bleach-fixing capacity. The method realizes acceleration of desilvering to reduce the processing time.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: August 9, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinzo Kishimoto, Toshihiro Nishikawa, Akira Abe, Junya Nakajima
  • Patent number: 4756918
    Abstract: The present invention, relates to a method for the bleaching-fixation processing of silver halide color photographic materials. The present invention provides for sufficient desilvering in a short period of time without deterioration of the photographic characteristic of the materials as processed while minimizing the amount of replenisher which is used. Accordingly, the present invention is a method for the processing of silver halide color photographic materials wherein, after the color-development, the material is processed by bleaching-fixation with at least two continuous bleaching-fixation baths to which a replenisher is fed in a countercurrent system, wherein the total bleaching-fixation processing time in the bleaching-fixation step is to be 0.37 minutes or more per g/m.sup.2 of the silver amount coated on the material and wherein the processing time in the first bleaching-fixation bath is to be 45% or less of the total bleaching-fixation processing time.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: July 12, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Akira Abe, Junya Nakajima
  • Patent number: 4717648
    Abstract: A process for processing a silver halide color reversal photographic light-sensitive material is disclosed, which comprises developing an imagewise exposed silver halide color reversal photographic light-sensitive material with a black-and-white developer containing at least one compound selected from the compounds of Group A, at least one compound selected from the compounds of Group B, and preferably further at least one compound selected from the compounds of Group C, whereinGroup A consists of organic heterocyclic compounds represented by formulae (A-I), (A-II), (A-III), and (A-IV) ##STR1## Group B consists of benzoimidazole, indazole, benzotriazole, benzooxazole and benzothiazole compounds, not containing a thiol group, a thioether bond, a thioketone group, or a disulfide bond.Group C consists of compounds represented by formulae (C-I) and (C-II). ##STR2## wherein the symbols are as defined in the appended claims.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: January 5, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Junya Nakajima, Tadao Shishido, Sadanobu Shuto
  • Patent number: 4717647
    Abstract: A method for the processing of a silver halide color photographic element comprising imagewise exposing the element, color developing the exposed element, followed by de-silvering, characterized in that the de-silvering step comprises processing the developed element in a bleaching bath containing an aminopolycarboxylic acid ferric ion complex salt and subsequently in a blixing bath containing an aminopolycarboxylic acid ferric ion complex salt and a fixing agent.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: January 5, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Abe, Junya Nakajima
  • Patent number: 4695529
    Abstract: An image-forming process is disclosed, which comprises exposing a silver halide color photographic material comprising a support having provided thereon at least one silver halide emulsion layer containing tabular silver halide grains having a diameter-to-thickness ratio of 5 or more, subjecting the exposed photographic material to color development processing, then processing the photographic material in a bath mainly having a bleaching ability and successively in a bath having a bleach-fixing ability.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: September 22, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Abe, Junya Nakajima, Toshihiro Nishikawa
  • Patent number: 4675274
    Abstract: A method for processing an imagewise exposed silver halide color reversal photographic material which comprises processing the color reversal photographic material with a black-and-white developer containing at least one compound represented by the following general formula (I-a) or (I-b): ##STR1## wherein M represents a hydrogen atom, an alkali metal, or an ammonium ion; R represents a hydrogen atom, an unsubstituted or substituted alkyl group, a hydroxy group, --SO.sub.3 M.sup.1, or --COOM.sup.1 ; R.sup.1 represents --SO.sub.3 M.sup.1 or --COOM.sup.1, wherein M.sup.1 represents a hydrogen atom, an alkali metal, or an ammonium ion; and n represents an integer of 1 to 6; and wherein n is 2 to 6, each of said Rs may be the same or different.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: June 23, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinji Ueda, Junya Nakajima
  • Patent number: 4588677
    Abstract: A method for processing a silver halide color photosensitive material which comprises processing a silver halide color photosensitive material containing at least one 4-mercapto-5-pyrazolone type magenta coupler represented by formula (I) ##STR1## wherein W represents an aryl group; X represents an alkyl group, an aryl group or a heterocyclic ring group; and Y represents an acylamino group, a ureido group, or an anilino group; with a color developer containing at least one compound selected from a compound represented by formula (II) ##STR2## wherein R represents a lower alkyl group, and M.sub.1 and M.sub.2, which can be the same or different, each represents a hydrogen atom, and an alkali metal atom, or an ammonium group; a compound represented by formula (III) ##STR3## wherein M.sub.3, M.sub.4, M.sub.5, M.sub.6 and M.sub.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: May 13, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Junya Nakajima
  • Patent number: 4543322
    Abstract: A process for processing a color photographic silver halide light-sensitive material comprising processing the color photographic silver halide light-sensitive material with a color developer containing at least one compound represented by the general formula (I): ##STR1## wherein X is a hydrogen atom, an alkali metal atom, an ammonium group, an alkyl group, or an aryl group; Y is a substituent on the phenyl group and is a halogen atom, an alkyl group, an alkoxy group, an amino group, a hydroxyl group, a nitro group, a sulfonic acid group or a carboxylic acid group; and n is 0, 1, 2, 3 or 4. Color developers containing the compounds of the general formula (I) have greatly increased stability and thus even after long-term storage, can be used to produce developed materials having superior photographic properties.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: September 24, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Junya Nakajima
  • Patent number: 4525449
    Abstract: A method of color reversal treatment of an exposed silver halide photographic material is disclosed. The method involves treating the exposed material with 2 both type black-and-white developing solutions. The first solution contains a compound represented by the general formula (I):R.sub.2 --S--R.sub.1).sub.d --S--R.sub.2 (I)wherein R.sub.1 represents an alkylene group having 2 to 10 carbon atoms, which may have ether bonds, R.sub.2 represents an alkyl group having 2 to 10 carbon atoms which alkyl group may have substituents, ether bonds or ester bonds, and d represents an integer of 0 to 3. The second black-and-white developing solution is a conventional solution. By utilizing the two solutions and specifically the first solution containing the compound of general formula (I) it is possible to obtain good photographic images having a high maximum density and good color balance.
    Type: Grant
    Filed: November 1, 1983
    Date of Patent: June 25, 1985
    Assignee: Fuji Photo Film Company, Limited
    Inventors: Junya Nakajima, Kiyoshi Imai, Takashi Nakamura
  • Patent number: 4506007
    Abstract: A method for processing an exposed silver halide color photographic material by development and desilvering is described, which comprises the steps of (1) treating said material in a color developing bath, (2) treating the developed material in a bath having incorporated therein at least one compound of formula (I) or a salt thereof: ##STR1## and (3) treating said material in a bath having bleaching or bleach-fixing ability.
    Type: Grant
    Filed: April 9, 1984
    Date of Patent: March 19, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Junya Nakajima, Isamu Itoh, Kiyohiko Yamamuro, Eiiti Ogawa
  • Patent number: 4444873
    Abstract: A process for processing a silver halide color photographic material is disclosed. The process particularly relates to bleaching and fixing of a color developed silver halide color photographic material. The color developed material is processed with an acid bleaching solution containing a ferric salt, inorganic salt and a halide. Immediately after the bleaching step, the photographic material is processed with the fixing solution containing 5 g/l to 50 g/l of polycarboxylic acids. By utilizing the bleaching and fixing steps disclosed it is possible to process a silver halide color photographic material rapidly utilizing a reduced number of baths, obtain an excellent bleaching rate and produce an image having excellent stability.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: April 24, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Kiyoshi Imai, Mamoru Tashiro, Junya Nakajima
  • Patent number: 4144068
    Abstract: In a method of processing an image-wise exposed silver halide color photographic material by applying thereto at least a color development processing and a silver removal processing (including performing a bleaching and a fixing separately or simultaneously, (e.g., a blixing)), the improvement which comprises processing, after the color development processing, the silver halide color photographic material with a processing bath containing a compound, as a bleach accelerator, represented by the following general formula (I): ##STR1## wherein R represents an --NR.sup.4 R.sup.5 group, an --O--R.sup.6 group or an --S--R.sup.6 group; R.sup.6 represents an atomic group necessary for forming a ring together with R.sup.1 ; R.sup.1, R.sup.4 and R.sup.5, which may be the same or different, each represents a hydrogen atom or an alkyl group; R.sup.2 and R.sup.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: March 13, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Ishibashi, Nobuo Sakai, Kiyoshi Imai, Junya Nakajima